<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>注册</title>
</head>
<body>
<h1>用户注册</h1>
<form action="">
    <input type="text" name="username" @blur="check()" placeholder="用户名">{{info}}<br>
    <input type="text" name="password" placeholder="密码"><br>
    <input type="text" name="nick" placeholder="昵称"><br>
    <input type="button" value="注册" @click="reg()">
</form>

<!--引入axios和vue-->
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<script>
    let v = new Vue({
        el:"form",
        data:{
            info:""
        },
        methods:{
            check:function () {
                let data = new FormData(document.querySelector("form"));
                axios.post("/check",data).then(function (response) {
                    v.info = response.data == 1 ? "用户名已存在" : "用户名可用";
                })
            },
            reg:function () {
                let data = new FormData(document.querySelector("form"));
                axios.post("/reg",data).then(function (response) {
                    if (response.data == 1){
                        alert("注册成功");
                        location.href = "login.html";
                    }else {
                        alert("用户名存在!注册失败")
                    }
                })
            }
        }
    })

</script>
</body>
</html>